<template>
  <div class="message">
    container
    <button @click="nextData()">Click</button>
    {{getInfo}}
    <!-- <button @click="changeData">Click</button>
    <div class="echarts" ref="main">
    </div> -->
  </div>
</template>

<script>
export default {
  data () {
    return {
      testMsg: "init value"
    }
  },
  methods: {
    show() {
      //   this.$echarts.init(this.$refs.main).setOption;
      // 基于准备好的dom，初始化echarts实例
      var myChart = this.$echarts.init(this.$refs.main)

      // 指定图表的配置项和数据
      var option = {
        title: {
          text: "ECharts 入门示例",
        },
        tooltip: {},
        legend: {
          data: ["销量"],
        },
        xAxis: {
          data: ["衬衫", "羊毛衫", "雪纺衫", "裤子", "高跟鞋", "袜子"],
        },
        yAxis: {},
        series: [
          {
            name: "销量",
            type: "bar",
            data: [5, 20, 36, 10, 10, 20],
          },
        ],
      }

      // 使用刚指定的配置项和数据显示图表。
      myChart.setOption(option)
    },
    async getData(){
      let num = await this.getInfo
      this.testMsg = num
    },
    async nextData () {
      let num = await this.getInfo
      console.log('click!')
      this.testMsg = num
    }
  },
  computed: {
    async getInfo () {
      const data = await fetch("http://127.0.0.1:5000/").then(e=>{
        return e.json()
      })
      return data
    },
    changeData () {
      this.getInfo
    }
  }
};
</script>

<style lang='less' scoped>
.message {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
  .echarts {
    width: 600px;
    height: 600px;
  }
}
</style>
